Hill, Paul; Megibben, Charles The nonseparability of simply presented mixed groups. (English) Zbl 0943.20053 Commentat. Math. Univ. Carol. 39, No. 1, 1-5 (1998). Summary: It is demonstrated that an isotype subgroup of a simply presented Abelian group can be simply presented without being a separable subgroup. In particular, the conjecture based on a variety of special cases that Warfield groups are absolutely separable is disproved. Cited in 4 Documents MSC: 20K21 Mixed groups 20K27 Subgroups of abelian groups Keywords:Warfield groups; simply presented Abelian groups; isotype subgroups; separable subgroups × Cite Format Result Cite Review PDF Full Text: EuDML